Police are searching for the person who threw two makeshift explosive devices from a vehicle in town Friday night.

Detective Pamela Mason said the first device was thrown at a Park Street home at about 11 p.m. It exploded in the driveway. The second device was thrown at Alicante Restaurant & Lounge, at 84 Uxbridge Road.

The one thrown at Alicante did not explode immediately, Mason said.

"One of the employees picked up a bottle that was thrown, tossed it into the trash, and then it exploded," she said.

There were no injuries or property damage.

Mason said the explosive devices were made using chemicals and a plastic bottle and were probably homemade. The car they were thrown from is possibly a brown-colored Honda, she said.

Evidence was sent to the state police crime lab, and local police are working with investigators assigned to the state fire marshal's office.

The ArsonWatch Reward Program is offering $5,000 to anyone who calls 1-800-682-9229 and provides information that leads to an arrest. Mason said residents can also call police at 508-478-2737.

The Police Department made a reverse 911 call to ask residents to be alert for bottles that look suspicious. The message advised people to call police rather than move or pick up any such bottles.

The Fire Department checked the area to see if there was anything that had not exploded yet.

"The goal is to get it before anything is detonated," Mason said. "They can contain toxic or explosive liquids."

(Julie Balise can be reached at 508-634-7546 or jbalise@wickedlocal.com.)